Imagine that a N.O. pushbutton is connected to a PLC input, and you push and release the button. To use that information, you you can act on any of the four states of this input's states. In chronological order, what are these "Four States of a Logic Bit" during an off-on-off event? Assume the "event" starts just before the button is pressed. 1. 2. False 3. Transition to False 4. True Pulsing On/off Transition to True Undefined

Imagine that a N.O. pushbutton is connected to a PLC input, and you push and release the button. To use that information, you you can act on any of the four states of this input's states. In chronological order, what are these "Four States of a Logic Bit" during an off-on-off event? Assume the "event" starts just before the button is pressed. 1. 2. False 3. Transition to False 4. True Pulsing On/off Transition to True Undefined

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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12) Study the ladder logic program in the figure below and answer the questions that follow: a. What is the purpose of interconnecting the two timers? b. How much time must elapse before output PL is energized? c. What two conditions must be satisfied for timer T4:2 to start timing? d. Assume that output PL is on and power to the system is lost. When power is restored, what will the status of this output be? e. When input PB2 is on, what will happen? f. When input PB1 is on, how much accumulate. Ladder logic program Output PB2 L2 T4:1 (RES Inputs L1 T4:2 (RES PB1 PL PB2 -RTO PB1 RETENTIVE TIMER ON T4:1 EN 1.0 2900 CON) Timer Time base Preset Accumulated -RTO PB1 T4:1 RETENTIVE TIMER ON Timer Time base T4:2 (EN) 1.0 DN Preset 1780 ON) Accumulated T4:2 PL HE DN
B) Write the Boolean expression and draw the typical PLC ladder logic diagram for a control system wherein a fan is to run only when all of the following conditions are met: • Input A is OFF • Input B is ON or input C is ON, or both B and C are ON • Inputs D and E are both ON
12) Study the ladder logic program in the figure below and answer the questions that follow: a. What is the purpose of interconnecting the two timers? b. How much time must elapse before output PL is energized? c. What two conditions must be satisfied for timer T4:2 to start timing? d. Assume that output PL is on and power to the system is lost. When power is restored, what will the status of this output be? e. When input PB2 is on, what will happen? f. When input PB1 is on, how much accumulate. Ladder logic program Output PB2 L2 T4:1 Inputs (RES L1 T4:2 PB1 (RES) PLO PB2 -RTO - RETENTIVE TIMER ON PB1 Timer Time base Preset T4:1EN) 1.0 2900 CON) Accumulated -RTO- PB1 T4:1 RETENTIVE TIMER ON Timer Time base T4:2 (EN) 1.0 DN Preset Accumulated 1780 CON) T4:2 PL DN
The numbers from 0-9 and a no characters is the Basic 1 digit seven segment display * .can show False True In a (CA) method of 7 segments, the anodes of all the LED segments are * "connected to the logic "O False True Some times may run out of pins on your Arduino board and need to not extend it * .with shift registers True False
Select a suitable example for for combinational logic circuit. O a. None of the given choices O b. De-multiplexer O c. PLA O d. Latches
1-2 Show the PLC implementation of the hardwired logic shown in Figure below, for the following scenarios using only one push button connection: (a) with the normally open contact connected to the input module and (b) with the normally closed contact connected to the input module. Describe the operation of each implementation as well. Use input address 10 for the push button and addresses 30 and 31 for pilot lights PL1 and PL2, respectively. Indicate the lights in the ON condition (without PB1 being pushed) using a shaded PL indicator. I
(c) Figure Q3(c)(i) shows a register and Figure Q3(c)(ii) shows the input waveforms (CLOCK and Data in) to the circuit. A1 A9 A10 A2 Function generator A3 A11 A12 AS A13 A6 A14 A7 A15 Data in Bop.7) ip.r 82p.7) Logic analyser U1 U2 U3 U4 UO 6. 1. 6 1 6 INVERTER 3 CLK 3 CLK oCLK CLK 5 K K 5 K K 4027 Clock Function generator Figure Q3(c)(i) (i) Determine the type of register as shown in Figure Q3(c)(i).
5. a) Explain why a stop button must be normally closed and a start button must be normally open. b) Consider a case where an input to a PLC is a normally closed stop button. The contact used in the ladder logic is normally open, as shown below. Why are they both not the same? (i.e., NC or NO) start stop motor motor
Study the ladder logic program in figure below and answer the questions that follows: a) What type of timer has been programmed? Explain the timers function in detail with suitable graph: b) What is the length of the time-delay period? c) What is the value of the accumulated time when power is first applied? d) When does the timer start timing? e) When does the timer stop timing and reset itself? Input LS1 Outputs L1 TON L2 TIMER ON DELAY Timer Time base Preset KEN T4:0 LS1 ISOL A-o 1 10 KON) Accumulated SOL B- T4:0 SOL A DN T4:0 SOL B 3 DN T4:0 EN T4.0 EN
4.a. What is the name of the nonprogrammable timer that is used to check the internal operation of the PLC?A. HousekeepingB. ScanC. WatchdogD. System4.b. Which one of the following terms is used to define the identifying letters placed above an input contact inladder logic?A. SurnameB. TitleC. StatementD. Locator
Design a combinational circuit using multiplexer for a car chime based on thefollowing system: A car chime or bell will sound if the output of the logic circuit(X) is set to a logic ‘1’. The chime is to be sounded for either of the followingconditions:• if the headlights are left on when the engine is turned off and• if the engine is off and the key is in the ignition when the door is opened.Use the following input names and nomenclature in the design process:• ‘E’ – Engine. ‘1’ if the engine is ON and ‘0’ if the engine is OFF• ‘L’ – Lights. ‘1’ if the lights are ON and ‘0’ if the lights are OFF• ‘K’ – Key. ‘1’ if the key is in the ignition and ‘0’ if the key is not in the ignition• ‘D’ – Door. ‘1’ the door is open and ‘0’ if the door is closed• ‘X’ – Output to Chime. ‘1’ is chime is ON and ‘0’ if chime is OFF
A logic program produces set of logic data as depicted in the Table 2 below. This logic program consumed around of 1MB of memory space if it was to be stored in a PLC. However, the PLC is only capable of storing around half of the required size. (a) What will you do to solve this problem? (b) By using solution suggestion in question (a), propose the new logic function (c) Determine the type and numbers of logic gates are required for the new logic function (d) Draw the logic gate